As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MSP - FL 856 - AFTER TAKEOFF, CRWE RECEIVED INDICATION THAT THE RIGHT MAIN LANDING GEAR WAS NOT SAFE. FLIGHT RETURNED TO MSP AND LANDED WITH NO FURTHER INCIDENT. MAINTENANCE FOUND THE RIGHT MAIN LANDING GEAR RETRACT MECHANISM SUPPORT FITTING LOOSE AND SECURED IT. (M)